NTI ML1 Specifications

Minilyzer ML1

Technical Specification, Software V2.00

updated Jul 2001

Technical Data General Functions

Measurements - Frequency, Level-RMS, Level-Relative

- THD+N, vu+PPM

- Polarity Test, Signal Balance Error

- Sweep, Frequency Sweep, Time Sweep

- 1/3rd Octave Spectrum, Scope

Frequency

Range 10 Hz to 20 kHz
Resolution 4 digits
Accuracy < ± 0.1 %

Level

Units dBu, dBV, V
Resolution 3 digits (dB-scale) or 4 digits (V-scale)
Accuracy ± 0.5 % @ 1 kHz
Bandwidth 20 Hz to 20 kHz
Flatness ± 0.1 dB

THD+N (Total Harmonic Distortion + Noise)

Meas. Bandwidth 10 Hz to 20 kHz
Resolution 3 digits (dB-scale) or 4 digits (%-scale)
Residual THD+N balanced < -85 dB @ -10 dBu to +20 dBu

unbalanced < -74 dB @ 0 dBu to +14 dBu

vu+PPM (vu-Indicator and Peak Program Meter)

according to IEC 60268 and DIN 45406.
PPM Type I, IIa and Nordic.
Both meters with adjustable reference and with
analog & numerical peak-hold readout.

Polarity Test (with MR1 test signal)

Positive / Negative detection through internal
microphone or XLR/RCA connector. Checks polarity
of tweeters, midrange-speakers, woofers, sub­woofers and cables. Down to 10 dB S/N ratio of
input signal.

RMS

Signal Balance Error Indication range 0.0 % to 100 %

Deviation from perfect balance in % or *1

Sweep Frequency Sweep: Level as function of frequency.

Time Sweep: Measurement of level, THD+N and
frequency as function of time.

1/3rdOctave Spectrum acc. IEC 1260, class II and ANSI S1.11-

1976, class II from 50 Hz to 20 kHz, Bargraph
for Level

Scope Auto triggering, auto ranging, auto scaling
Filters Linear, A-weighting, C-weigting, C-message,

Highpass 22 Hz / 60 Hz / 400 Hz, X-Curve-1, Voice
bandpass

Input Connectors XLR balanced, RCA unbalanced
Input Impedance 40 kOhm balanced, 20 kOhm unbalanced
Input RMS1 ( upper meas. limit )

balanced +20 dBu (7.75 V
+14 dBu (3.8 V

Max. DC Input ± 50 V
Residual Noise < 12 µV, XLR-input shorted
Microphone Input (for Polarity measurement only)

Omnidirectional

Monitor Output Jack 3.5 mm (1/8“), suitable for all common

headsets

Display Graphic LCD 64 x 100 pixel, with backlight
Batteries 3x AA package dry batteries (alkaline) Typical

battery lifetime > 16 hrs

Dimensions (L x W x H)

163 x 86 x 42 mm (6.4“ x 3.38“ x 1.63“)

Weight 300 g (10.5 oz) incl. batteries
Temperature 0° to +45° C (32° to 113° F)
Humidity < 90 % R.H., non condensing

20 Hz to 20 kHz

RMS

RMS

DC

) unbalanced

)

RMS

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for input levels > 20 dBu (balanced) the ML1 Adapter -20 dB is

available

Minilyzer ML1

Technical Data Acoustic Functions

(firmware 2.00 or higher, applicable with MiniSPL only)

Measurements - Sound Pressure Level

- 1/3rd Octave Spectrum

Acoustical Functions

in accordance with IEC60651 and IEC 60804

• Instantaneous Sound Pressure Level (Lp)

• Maximum/Minimum Sound Pressure Level (Lmax/Lmin)

• Time Response selectable

• Weighting Filters

• Equivalent Continuous Sound Pressure Level (Leq)

• Pause- and Continue Function

Sound Pressure Level

Units dB
Resolution 3 digits
Display Ranges 20 - 140 dB

Bandwidth 20 Hz to 20 kHz
Flatness According to class 1

SPL

, dB

, dB

Leq

, dB

LAeq

LCeq

in 3 bands 20 - 100 dB

SPL

40 - 120 dB
60 - 140 dB

SPL
SPL
SPL

Time Response Selectable fast, slow, impuls
Weighting Filters Selectable A, C, linear,

X-Curve-1 (for 1/3rd octave spectrum only)

Integration Pause- and Continue Function

1/3rdOctave Spectrum

31 octave band display 20 Hz to 20 kHz

Sensitivity Selectable default value (MiniSPL),

calibration to external source,
editable sensitivity value

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